Electric-light fixture.



J. S. GUMING.

ELECTRIC LIGHT FIXTURE.

I urmoumx FILED snrzm, 1909.

986,550. A I Patented Mar.14, 1911.

fiftieselizfiz j dam 11y.

UNITED STATES PATENT ()FETCLI.

JAMES S. CUMING, OF ST. LOUIS, MISSQURI.

ELECTRIC-LIGHT FIXTURE.

To all whom it may concern:

Be it known that I, JAMES S. GUMIXG, a citizen of the United States, andresident of St. Louis, Missouri, have invented certain new and usefulImprovements in Electric- Light Fixtures, of which the following is aspecification containing a full, clear, and exactdescription, referencebeing had to the accompanying drawings, forming a part hereof.

This invention relates to adapters for electric lamp fixtures, theobject of my invention being to provide an adapter especially designedfor use in connection with tung sten lamps in which, by reason of theextreme delicacy of the filament, it is essential that the lamps be hungin a substantially vertical position.

A further object of my invention is to provide an adapter especiallydesigned for use in connection with electric fixtures having stemsprojecting at an angle relative to the horizontal to provide for thehanging of a socket containing a tungsten lamp in a vertical positionfrom the stem.

A further object of my invention is to provide an adapter for electriclamps in which vibrations imparted to the fixture will I be taken up andabsorbed in the adapter and not imparted to the lamp or the filamentwithin the lamp.

For the above purposes my invention consists in certain novel featuresof construction and arrangement of parts as will be hereinafter morefully set forth, pointed out in my claims and illustrated in theaccompanying drawing, in which:

Figure l is an elevation of an electrolier showing stems for holding thelamps and shades therefor at an angle relative to the vertical, the stemon the left hand side being provided. with one of my improved adapterswhich will suspend a lamp from the stem and maintain it in a verticalposition; Fig. 2 is an elevation of a complete adapter detached; Fig. 3is a vertical sectional elevation through the entire adapter showingsections of insulated wires inserted therethrough and a portion of alamp socket in dotted. lines; and, Fig. 4; is a sectional plan taken onthe line 4l lof Fig. 2..

Referring by numerals to the accompanying drawing: 1 designates the bodyportion of an electrolier.

2 designates the stems projecting from the body portion of theelectrolier. As shown,

Specification of Letters Patent.

Application filed September 7, 1999.

Patented Mar. 14, 1911.

Serial No. 516,490.

the stems 2, at their outer ends, occupy positions at an angle relativeto the vertical.

The lamp at the right hand side of Fig. l is of ordinary constructionand shows a socket 3 which is threaded to the end of the stem 2 and heldin a position at an angle relative to the vertical, This shows theordinary electric fixture having the stem in a slanting position, thesocket and lamp being connected rigidly to the fixture.

Threaded to the end of the left hand stem 2 is my improved adapterarranged to suspend a lamp and permit it to hang by gravity in avertical position.

h [y adapter comprises an upper tubular section at being internallythreaded at 5 and carrying a pin 6 having reduced end portions 7.Embracing the reduced ends 7 of the pin 6 are a pair of links 8 whichare secured to the pin 6 by riveting or upsetting the reduced ends 7.

Suspended from the links 8 is a pin 9 having reduced ends 10, similar-tothe pin 6 and suspended from the pin 9 is a lower tubular section 11having a reduced threaded extension 12 to which the lamp socket 3 isthreaded.

It is to be noted that the pins each are of a length between shouldersgreater than the diameter of the tubular sections 4t and 9, whichconstruction permits play of the tubular sections relative to the pinsand in this manner lateral vibrations of the electrolier are compensatedfor and not imparted to the lamp socket and its filament.

By reason of the pivotal connection by the links 8 between the tubularsections longitudinal vibrations of the electrolier are compensated forand not imparted to the socket and filament within the lamp.

I claim:

1. An adapter for electric illuminating fixtures, comprising a memberfor attach' ment to the fixture, a member for attachmentto the lampsocket and means for loosely, pivotally, connecting the two memberswhich means are free to move lengthwise of their bearings for limiteddistances whereby vibrations imparted to one of the members will beabsorbed and not imparted to the second member.

2. An adapter for electric illuminating fixtures, comprising a tubularmember internally threaded for attachment to the electrio fixtures, pinsupported in the tubular member, a second tubular member externallythreaded for attachmentto a lamp socket, l and a pin carried by thesecond member and links piyotally connecting the pins.

3. An adapter for electric illuminatingi fixtures, comprising a tubularmember, ar-

tubular member, the length 01 which is greater than the diameter of thetubular member and links pivotally connecting the pins.

In testimony whereof I have signed my name to this specification, inpresence of two subscribing witnesses.

JAMES S. CUMING. lVitnesses H. G. FLETCHER, E. L. \VALLACE.

ranged for attachment with the electric fiX- ture, a pin carried by thetubular member, the length of which is greater than the diameter of thetubular member, a second tubular member arranged for attachment to alamp socket, a pin carried by the second Copies of this patent may beobtained for five cents each, by addressing the Commissioner of Patents,Washington, D. 0.

